• 한국치위생학회지
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• 제13권4호
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• pp.701-711
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• 2013

Objectives : The aim of this study was to evaluate the pH and buffering capacity in some commercial fermented milks in Korea. Methods : The study was carried ouf from June to August, 2012. In 35 liquid type, 79 condense-stirred type and 71 condense-drink type fermented milks, available on the market, pH and buffering capacity were measured. Titration(with NaOH) was used to determine the buffering effect of each fermented milk. They were titrated with 1 M sodium hydroxide, added in 0.1 milliliters increments, until the pH reached about 5.5 and 7.0. Results : The average pH of tested fermented milks was $4.08{\pm}0.27$. The average pH values of fermented milks were $3.64{\pm}0.22$ in liquid type, $4.14{\pm}0.12$ in condense-stirred type, and $4.22{\pm}0.17$ condense-drink type. The average buffering capacity (pH 5.5) of tested fermented milk was $2.40{\pm}0.54$. The average buffering capacity (pH 5.5) of liquid type fermented milk was $2.37{\pm}0.33$, condense-stirred type fermented milk was $2.77{\pm}0.46$ and condense-drink type fermented milk was $2.01{\pm}0.42$. The average buffering capacity (pH 7.0) of tested fermented milks was $4.00{\pm}0.87$. The average buffering capacity (pH 7.0) of liquid type fermented milk was $3.11{\pm}0.36$, condense-stirred type fermented milk was $4.78{\pm}0.55$ and condense-drink type fermented milk was $3.58{\pm}0.59$. Conclusions : The average pH of tested fermented milks in this study was lower than pH 4.5. The type of fermented milks was an important factor for selection of fermented milk which is related with enamel erosion.

• 대한전자공학회논문지TC
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• 제42권7호
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• pp.19-26
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• 2005

최근 무선 인터넷의 수요가 기하급수적으로 증가함에 따라 Mobile IPv6가 제안되었으며, 이에 따른 핸드오버 지연을 줄이기 위한 빠른 핸드오버 기법이 제안되었다(IETF). 본 논문에서는 빠른 핸드오버 기법에서 발생하는 패킷의 손실 문제와 패킷의 비순서 문제를 해결하고 이로 인한 처리 지연을 줄일 수 있는 버퍼링 기법을 제안하였다. 또한 제안된 다양한 버퍼링 구조에 의한 빠른 핸드오버 기법의 성능 영향을 시뮬레이션을 통하여 분석하였다. 시뮬레이션을 통한 분석 결과, 제안된 버퍼링 기법은 패킷의 손실과 패킷의 비 순서를 해결하였고, 또한 기존 빠른 핸드오버 방식보다 버퍼링 기법은 최대 27$\%$정도 지연을 감소하였다.

• 아동학회지
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• 제13권2호
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• pp.175-188
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• 1992

This study investigated the relation between stressful life events and adjustment in elementary school children, with particular emphasis on the potential main and stress-buffering effects of social support and social problem solving skills. 4-6 graders (N=170) completed the Social Support Appraisals Scale(SSAS) and social problem solving skills task. The SSAS is a 31-item measure that taps the child's perceptions or appraisals of family, peer, and teacher support. Their parents provided ratings of stress in the child's environment and ratings of the child's behavioral adjustment. Teachers provided ratings of the child's behavioral and academic adjustment. Hierarchical multiple regression analyses and graphic display were used to analyze the data. The major findings were that (1) The results for parent-rated problems supported a stress-buffering model for family support and problem solving. (2) The results for teacher-rated problems were consistent with the stress-buffering model of social support. (3) The results for grade-point average supported a main effect model for problem solving. peer support, and family support. In addition, teacher support had the strongest stress-buffering effect on grade-point average.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권3호
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• pp.1416-1428
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• 2016

In this paper, we address the channel zapping time problem of video streaming services based on HTTP Live Streaming (HLS) on smart Over-The-Top Set-Top Boxes (OTT STBs). Experimental analysis of the channel zapping time, show that smart OTT STBs inevitably suffer from the accumulated zapping time through channel change request, Internet Group Management Protocol (IGMP) leave/join, synchronization delay, video buffer delay, and STB processing delay when providing HLS services. As a practical solution for the zapping time reduction, an adaptive buffering method is proposed. The proposed method exploits two adaptive buffers added to the basic HLS player. These two adaptive buffers are responsible for constantly buffering previous and next channels relative to the current channel. Implementation and test results show that a stable zapping time less than one second can be achieved even under diverse video bitrate changes and varying network conditions by the proposed adaptive buffering method.

• 생명과학회지
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• 제11권3호
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• pp.197-202
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• 2001

This study was conducted to investigate the effect of simulated acid solution(SAS) on acid buffering capacity, chlorophyll content and butrient leacking in 4 herb species(Petunia hybrida Vilm, Gomphrena globosa L. Celosia cristat L. Salvia officinallis L) . The acid buffering capacity in the leves was increased in the treatment of pH 3.0 in Celosia L., whereas it was increased at pH 4.0 in Petunia Petunia hybrida Vilm. and Gomprean globosa L.. But, the acid buffering capacity of the leaves did not work at ph 2.0 treatment in 4 herb species. With decreasing pH level, the chlorophyll content of Petunia hybrida Vilm. and Gomphrena globosa L. Was markedly decreased than that of Gelosia cristata L. and Savia officinalis L. As the pH levels decreased from 5.6 to 2.0 the nutrient leaching from leaves was significantly increased in 4 herb species. In pH 4.0 and 5.6, the concentrations of nutrient leaching from leaves were higher in Perunia hybrida Vilm. and Gomphrean globosa L. than Gelosia cristata L. and Salvia officinalis L., Based on the results, there was a great differences in response to SAS among the 4 herb species. Im general, Gelosia cristata L. and Salvia officinalis L. represented a higher tolerance to SAS Petunia hybrida Vilm, and Gomphrena globosa L..

• 한국방재안전학회논문집
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• 제15권1호
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• pp.23-34
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• 2022

유독성 물질로 인한 환경오염사고 방지 및 수환경 보호를 위해 정부에서는 완충저류시설의 설치를 제도적으로 추진하고 있다. 완충저류시설은 사고유출수 및 초기우수를 저류하여 수질오염을 방지하는 긍정적인 역할에도 불구하고 관련연구 및 시설의 설계를 위한 구체적인 가이드 라인은 부족한 실정이다. 본 연구에서는 완충저류시설 설계 도서를 분석하여 어떠한 항목을 설계에 반영하였는지 분석하였다. 분석결과를 바탕으로 설계항목을 도출하고, 완충저류시설 관계자의 의견을 반영하여 완충저류시설의 설계에 필요한 항목을 제안하였다.

• 한국시뮬레이션학회논문지
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• 제11권1호
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• pp.1-10
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• 2002

IETF proposed Fast Handover mechanism tn reduce the latency during which the mobile node is effectively dusconnected from the Internet. In this paper, we propose three buffering strategies and a bicasting strategy to resolve packet loss and packet disordering problems in Fast Hangover mechanism. Through Java-based simulation we show thats, packet loss and disordering problems have been resolved by our proposal. As the result the buffering and bicasting strategies can reduce the handover delay caused by packet loss and packet disordering, in addition.

• 한국지하수토양환경학회지:지하수토양환경
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• 제18권1호
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• pp.129-136
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• 2013

This research was conducted to investigate effects of acid buffering capacity and soil component in treatment of phenanthrene using electrokinetic-Fenton process. In Hadong clay of high acid buffering and low iron oxide content, it was difficult to oxidize phenanthrene due to shortage of iron catalyst and scavenger effect of carbonate minerals. The desorbed phenanthrene conductive to Fenton oxidation was transported toward cathode by electroosmotic flow. However, in Youngdong illitic clay, oxidation of phenanthrene near anode readily occurred compared to Hadong clay due to high iron content and low acid buffering capacity.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 The Korea-Japan Joint Symposium
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• pp.51-52
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• 2003

In order to understand the buffering behavior of hygroscopic fabric under subzero conditions, microclimates of the wool and PET clothing system were measured and compared. Vertical type Man-Clothing-Environment simulator was used to measure the microclimate at the environmental temperature of -10$^{\circ}C$. Buffering capacity was quantified by calculating from the depth and width of the hyperbolic curve of the graph. Hydrophilic wool fabrics showed better buffering capacity at the transient state than hydrophobic PET fabrics; which is attributed to the heat of sorption.

• 한국생활과학회지
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• 제13권5호
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• pp.637-646
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• 2004

The purpose of this study is to examine the relation between parental strain and marital adjustment of employed mothers after their transition to the parenthood, and to investigate buffering effect of social support on the relation. The parental strain variables (physical strain and emotional strain) appear to be significant predictors of marital adjustment for employed mothers with first baby. The analysis on interaction effect indicates that social support can be a positive buffering indicator. A comparison reveals that mothers with high physical strain have significantly higher marital adjustment than those with low strain. But in the context of high social support, the difference of marital adjustment between the two mothers is reduced.